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1STM32 Timers driver bindings
2
3This IP provides 3 types of timer along with PWM functionality:
4- advanced-control timers consist of a 16-bit auto-reload counter driven by a programmable
5 prescaler, break input feature, PWM outputs and complementary PWM ouputs channels.
6- general-purpose timers consist of a 16-bit or 32-bit auto-reload counter driven by a
7 programmable prescaler and PWM outputs.
8- basic timers consist of a 16-bit auto-reload counter driven by a programmable prescaler.
9
10Required parameters:
11- compatible: must be "st,stm32-timers"
12
13- reg: Physical base address and length of the controller's
14 registers.
15- clock-names: Set to "int".
16- clocks: Phandle to the clock used by the timer module.
17 For Clk properties, please refer to ../clock/clock-bindings.txt
18
19Optional parameters:
20- resets: Phandle to the parent reset controller.
21 See ../reset/st,stm32-rcc.txt
22- dmas: List of phandle to dma channels that can be used for
23 this timer instance. There may be up to 7 dma channels.
24- dma-names: List of dma names. Must match 'dmas' property. Valid
25 names are: "ch1", "ch2", "ch3", "ch4", "up", "trig",
26 "com".
27
28Optional subnodes:
29- pwm: See ../pwm/pwm-stm32.txt
30- timer: See ../iio/timer/stm32-timer-trigger.txt
31- counter: See ../counter/stm32-timer-cnt.txt
32
33Example:
34 timers@40010000 {
35 #address-cells = <1>;
36 #size-cells = <0>;
37 compatible = "st,stm32-timers";
38 reg = <0x40010000 0x400>;
39 clocks = <&rcc 0 160>;
40 clock-names = "int";
41
42 pwm {
43 compatible = "st,stm32-pwm";
44 pinctrl-0 = <&pwm1_pins>;
45 pinctrl-names = "default";
46 };
47
48 timer@0 {
49 compatible = "st,stm32-timer-trigger";
50 reg = <0>;
51 };
52
53 counter {
54 compatible = "st,stm32-timer-counter";
55 pinctrl-names = "default";
56 pinctrl-0 = <&tim1_in_pins>;
57 };
58 };
59
60Example with all dmas:
61 timer@40010000 {
62 ...
63 dmas = <&dmamux1 11 0x400 0x0>,
64 <&dmamux1 12 0x400 0x0>,
65 <&dmamux1 13 0x400 0x0>,
66 <&dmamux1 14 0x400 0x0>,
67 <&dmamux1 15 0x400 0x0>,
68 <&dmamux1 16 0x400 0x0>,
69 <&dmamux1 17 0x400 0x0>;
70 dma-names = "ch1", "ch2", "ch3", "ch4", "up", "trig", "com";
71 ...
72 child nodes...
73 };